If you observe or are informed of any condition which affects the safe use of a landing area:
NOTE: Civil airport managers are required to provide a list of airport employees who are authorized to issue information concerning conditions affecting the safe use of the airport.
If an aircraft requests to takeoff, land, or touch-and-go on a closed or unsafe runway, inform the pilot the runway is closed or unsafe, and
Issue airport condition information necessary for an aircraft's safe operation in time for it to be useful to the pilot. Include the following, as appropriate:
NOTE: Braking action on wet ash may be degraded. Dry ash on the runway may necessitate minimum use of reverse thrust.
Furnish quality of braking action, as received from pilots, to all aircraft as follows:
NOTE: The term “nil” is used to indicate bad or no braking action.
NOTE: Descriptive terms, such as the first or the last half of the runway, should normally be used rather than landmark descriptions, such as opposite the fire station, south of a taxiway, etc. Landmarks extraneous to the landing runway are difficult to distinguish during low visibility, at night, or anytime a pilot is busy landing an aircraft.
NOTE: USAF offices furnish RCR information at airports serving USAF and ANG aircraft.
NOTE: USAF. Web barriers at the departure end of the runway may remain in the up position when requested by the senior operational commander. The IFR Enroute Supplement and AP-1 will describe specific barrier configuration. ATC will advise transient aircraft of the barrier configuration using the phraseology in subpara c, below.